Good points, all.
I think I misliked Pascal's nested procedures because they weren't true lambdas; once the outer procedure returned, the inner procs were no longer callable (just one contiguous stack, right?). Early-on, using C++ lambdas, I found myself making the same mistake in a design for some asynchronous completion stuff. Embarrassing; C++ and Pascal are not JavaScript/Lisp/Scheme/Smalltalk :-)